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Structure of electron bifurcating ni-fe hydrogenase complex hydabcsl in FMN/NAD(H) bound state

Analyse Structure of electron bifurcating ni-fe hydrogenase complex hydabcsl in… in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
7T30
Type
protein
Length
3,578 residues
Chains
10
Method
electron microscopy
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Nife hydrogenase subunit a; Nife hydrogenase subunit B; Nife hydrogenase subunit C; Nife…
UniProt
I4BYB4, I4BYB5, I4BYB8, I4BYB2, I4BYB3
Ligands
SF4, FES, NAD, FMN, FCO, 3NI
Pockets
20 · best druggability 0.77

Structure

electron microscopy · 5 distinct chains · 38% helix, 14% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A, FNife hydrogenase subunit aprotein66630% helix, 13% strandI4BYB4
B, GNife hydrogenase subunit Bprotein42542% helix, 12% strandI4BYB5
C, HNife hydrogenase subunit Cprotein7260% helix, 0% strandI4BYB8
D, INife hydrogenase large subunitprotein44744% helix, 17% strandI4BYB2
E, JNife hydrogenase small subunitprotein17933% helix, 16% strandI4BYB3

Ligands and binding sites

  • SF4 · Iron/sulfur cluster · ligand · 12 copies · chains A, B, D, E, F, G, I, J
  • FES · Fe2/s2 (inorganic) cluster · ligand · 4 copies · chains A, B, F, G
  • NAD · Nicotinamide-adenine-dinucleotide · ligand · 2 copies · chains B, G
  • FMN · Flavin mononucleotide · ligand · 2 copies · chains B, G
  • FCO · Carbonmonoxide-(dicyano) iron · ligand · 2 copies · chains D, I
  • 3NI · Nickel (III) ion · metal · 2 copies · chains D, I

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

20 pockets found on a 1 Å grid, 20 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
18470.770.8169NAD, FMN
28010.770.8169NAD, FMN
37850.730.7864empty
47890.730.7858empty
5530.720.9920empty

Interfaces

14 interfaces between chains.

  • I–J · 2763 Ų buried · 32 hydrogen bonds · protein-protein
  • D–E · 2746 Ų buried · 32 hydrogen bonds · protein-protein
  • A–B · 1489 Ų buried · 14 hydrogen bonds · protein-protein
  • F–G · 1482 Ų buried · 14 hydrogen bonds · protein-protein
  • A–E · 1040 Ų buried · 6 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 2 covalent (covalent ligand).

Compared structures

  • 7T30 · Structure of electron bifurcating Ni-Fe hydrogenase complex HydABCSL in FMN/NAD(H) bound… · the same entry in another collection · chain A against A, TM-score 1.00

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